full-disclosure - Re: tar alternative

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Message-Id: <1158818069.22776.40.camel@wssyg02.sygroup-int.ch>
Date: Thu, 21 Sep 2006 07:54:28 +0200
From: Tonnerre Lombard <tonnerre.lombard@...roup.ch>
To: Jon Hart <jhart@...ofed.org>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: tar alternative

Salut,

On Wed, 2006-09-20 at 13:37 -0700, Jon Hart wrote:

> Think of some of the risks here.  tar archives that unpack into . or
> ../../../some/sensitive/dir

The former is plain evil but can be avoided, the latter is usually
extracted to ./some/sensitive/dir. Anything else would be a usual
directory traversal vulnerability. Yes, they also exist, but if so, it
needs to be fixed inside your tar program.

NetBSD and Solaris tar for example don't seem to have this
vulnerability. Nor does the dreaded GNU tar.

				Tonnerre
-- 
SyGroup GmbH
Tonnerre Lombard

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Tel:+41 61 333 80 33    Roeschenzerstrasse 9
Fax:+41 61 383 14 67    4153 Reinach BL
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